THE UPGRADE: Complete series: Books 1 - 6

From Book 1:

There's a corporate cabal that wants to rule the world. Some might say it has been doing it already for decades by whatever means necessary. But they are no longer content to hide in the shadows. They want to become true masters.

Jason Hunt knows nothing about that world. But when his wife becomes ill, he finds himself pitted against the cabal that might hold the key to her survival. To save her, he needs to embrace technology he doesn't understand, take over a billion-dollar company without a billion dollars, outsmart professional assassins, and land a contract with the DOD. But even that might not be enough.

THE UPGRADE SERIES:

THE BLUEPRINT
VERTIGO
THE LOOP
SPARE PARTS
FATA MORGANA
DEUS EX MACHINA